[Evaluation of renal blood volume by PET--the aorta-kidney equilibrium monitored with C15O].
Twenty subjects inhaled C15O and its dynamics were monitored to determine when equilibrium between the aorta and kidney occurred. One minute after inhalation, the increase in radioactivity in the aorta paralleled that in the kidney, but thereafter, both declined slowly. The ratio of aorta/kidney radioactivity become constant 1 min after inhalation and remained unchanged for 4 min. Thus renal blood volume can be measured 1 min after inhalation of C15O its distribution in the aorta and kidney has attained equilibrium.
Yamashita
M
M
Kyoto Prefectural University of Medicine.
Inaba
T
T
Oda
Y
Y
Mizukawa
N
N
Ushijima
Y
Y
Furuya
S
S
Nakahashi
H
H
D000280:Administration, Inhalation; D001011:Aorta / Q000000981:diagnostic imaging*; D001811:Blood Volume Determination / Q000379:methods*; D002248:Carbon Monoxide / Q000008:administration & dosage; D006801:Humans; D007668:Kidney / Q000098:blood supply* / Q000000981:diagnostic imaging; D010104:Oxygen Radioisotopes; D014055:Tomography, Emission-Computed
D010104:Oxygen Radioisotopes; D002248:Carbon Monoxide